LLVM  9.0.0svn
AArch64PBQPRegAlloc.h
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1 //==- AArch64PBQPRegAlloc.h - AArch64 specific PBQP constraints --*- C++ -*-==//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #ifndef LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H
10 #define LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H
11 
12 #include "llvm/ADT/SetVector.h"
14 
15 namespace llvm {
16 
17 class TargetRegisterInfo;
18 
19 /// Add the accumulator chaining constraint to a PBQP graph
21 public:
22  // Add A57 specific constraints to the PBQP graph.
23  void apply(PBQPRAGraph &G) override;
24 
25 private:
27  const TargetRegisterInfo *TRI;
28 
29  // Add the accumulator chaining constraint, inside the chain, i.e. so that
30  // parity(Rd) == parity(Ra).
31  // \return true if a constraint was added
32  bool addIntraChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra);
33 
34  // Add constraints between existing chains
35  void addInterChainConstraint(PBQPRAGraph &G, unsigned Rd, unsigned Ra);
36 };
37 
38 } // end namespace llvm
39 
40 #endif // LLVM_LIB_TARGET_AARCH64_AARCH64PBQPREGALOC_H
Abstract base for classes implementing PBQP register allocation constraints (e.g. ...
This class represents lattice values for constants.
Definition: AllocatorList.h:23
void apply(PBQPRAGraph &G) override
TargetRegisterInfo base class - We assume that the target defines a static array of TargetRegisterDes...
const DataFlowGraph & G
Definition: RDFGraph.cpp:202
Add the accumulator chaining constraint to a PBQP graph.